GM Service Manual Online
For 1990-2009 cars only
Figure 1:

B+ Bus


Object Number: 1566803  Size: FS
Master Electrical Component List
Control Module References
ABS, BLOWER, MBEC, STUD 1, STUD 2, and VSES/ECAS Fuses and RT DOORS and SEATS Circuit Breakers
Figure 2:

ABS, BLOWER, MBEC, STUD 1, STUD 2, and VSES/ECAS Fuses and RT DOORS and SEATS Circuit Breakers


Object Number: 1566805  Size: FS
Master Electrical Component List
Control Module References
DDM, INFO, LBEC 1, LBEC 2, LGATE, LOCKS, PDM, TBC 2A, TBC 2B, and TBC 2C Fuses and LEFT DOOR and MIDGATE Circuit Breakers
B+ Bus
B+ Bus
B+ Bus
Figure 3:

STUD #2, OFF-ROAD LAMP SWITCH, OFF-ROAD LAMPS 1, OFF-ROAD LAMPS 2 Fuses


Object Number: 1657391  Size: FS
Master Electrical Component List
Control Module References
DDM, INFO, LBEC 1, LBEC 2, LGATE, LOCKS, PDM, TBC 2A, TBC 2B, and TBC 2C Fuses and LEFT DOOR and MIDGATE Circuit Breakers
ABS, BLOWER, MBEC, STUD 1, STUD 2, and VSES/ECAS Fuses and RT DOORS and SEATS Circuit Breakers
B+ Bus
B+ Bus
Figure 4:

DDM, INFO, LBEC 1, LBEC 2, LGATE, LOCKS, PDM, TBC 2A, TBC 2B, and TBC 2C Fuses and LEFT DOOR and MIDGATE Circuit Breakers


Object Number: 1566809  Size: FS
Master Electrical Component List
Control Module References
4WS, RR DEFOG, RR WPR, STOP LP, VEH CHMSL, and VEH STOP Fuses
STUD #2, OFF-ROAD LAMP SWITCH, OFF-ROAD LAMPS 1, and OFF-ROAD LAMPS 2 Fuses
B+ Bus
B+ Bus
Figure 5:

4WS, RR DEFOG, RR WPR, STOP LP, VEH CHMSL, and VEH STOP Fuses


Object Number: 1566811  Size: FS
Master Electrical Component List
Control Module References
HVAC/ECAS, IPC/DIC, PCM B, SEO B1, SEO B2, TBC BATT, and TREC Fuses
DDM, INFO, LBEC 1, LBEC 2, LGATE, LOCKS, PDM, TBC 2A, TBC 2B, and TBC 2C Fuses and LEFT DOOR and MIDGATE Circuit Breakers
B+ Bus
B+ Bus
Figure 6:

HVAC/ECAS, IPC/DIC, PCM B, SEO B1, SEO B2, TBC BATT, and TREC Fuses


Object Number: 1566812  Size: FS
Master Electrical Component List
Control Module References
AUX PWR, CIG LTR, RADIO, RADIO AMP, and SUNROOF Fuses
4WS, RR DEFOG, RR WPR, STOP LP, VEH CHMSL, and VEH STOP Fuses
B+ Bus
B+ Bus
Figure 7:

AUX PWR, CIG LTR, RADIO, RADIO AMP, and SUNROOF Fuses


Object Number: 1566816  Size: FS
Master Electrical Component List
Control Module References
FRT PARK, LR PARK, RR PARK, and TRL PARK Fuses
HVAC/ECAS, IPC/DIC, PCM B, SEO B1, SEO B2, TBC BATT, and TREC Fuses
B+ Bus
B+ Bus
Figure 8:

FRT PARK, LR PARK, RR PARK, and TRL PARK Fuses


Object Number: 1566817  Size: FS
Master Electrical Component List
Control Module References
INT PARK Fuse
AUX PWR, CIG LTR, RADIO, RADIO AMP, and SUNROOF Fuses
B+ Bus
B+ Bus
Trailer Lighting Provisions
INT PARK Fuse
Figure 9:

INT PARK Fuse


Object Number: 1566818  Size: FS
Master Electrical Component List
Control Module References
Ignition Switch - ACCY/RUN/START, RUN and START Bus Bars, and CRANK and IGN A Fuses
FRT PARK, LR PARK, RR PARK, and TRL PARK Fuses
FRT PARK, LR PARK, RR PARK, and TRL PARK Fuses
SIR Schematic Icons
Figure 10:

Ignition Switch - ACCY/RUN/START, RUN, and START Bus Bars, and CRANK and IGN A Fuses


Object Number: 1566820  Size: FS
Master Electrical Component List
Control Module References
Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse
INT PARK Fuse
B+ Bus
B+ Bus
Figure 11:

Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse


Object Number: 1566821  Size: FS
Master Electrical Component List
Control Module References
B/U LP, BTSI, 02A, 02B, TBC IGN1, and TRL B/U Fuses
Ignition Switch - ACCY/RUN/START, RUN and START Bus Bars, and CRANK and IGN A Fuses
B+ Bus
B+ Bus
Figure 12:

B/U LP, BTSI, 02A, 02B, TBC IGN1, and TRL B/U Fuses


Object Number: 1566822  Size: FS
Master Electrical Component List
Control Module References
AIR BAG, IGN E, and SEO IGN Fuses
Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse
Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse
Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse
Figure 13:

IGN E, SEO IGN and SIR Fuses


Object Number: 1566823  Size: FS
Master Electrical Component List
Control Module References
IGN 0, RR WPR, SEO ACCY, TBC ACCY, TBC IGN 0, and WS WPR Fuses
B/U LP, BTSI, 02A, 02B, TBC IGN1, and TRL B/U Fuses
Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse
Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse
SIR Schematic Icons
SIR Schematic Icons
Figure 14:

IGN 0, RR WPR, SEO ACCY, TBC ACCY, TBC IGN 0, and WS WPR Fuses


Object Number: 1566824  Size: FS
Master Electrical Component List
Control Module References
4WD, BRAKE, CRUISE, HVAC 1, and IGN 3 Fuses
AIR BAG, IGN E, and SEO IGN Fuses
Ignition Switch - ACCY/RUN and RUN/START Bus Bars and IGN B Fuse
Ignition Switch - ACCY/RUN/START, RUN and START Bus Bars, and CRANK and IGN A Fuses
Figure 15:

4WD, BRAKE, CRUISE, HVAC 1, and IGN 3 Fuses


Object Number: 1566826  Size: FS
Master Electrical Component List
Control Module References
FLASH, LT TRLR, LT TURN, RT TRLR, and RT TURN Fuses
IGN 0, RR WPR, SEO ACCY, TBC ACCY, TBC IGN 0, and WS WPR Fuses
Ignition Switch - ACCY/RUN/START, RUN and START Bus Bars, and CRANK and IGN A Fuses
Figure 16:

FLASH, LT TRLR, LT TURN, RT TRLR, and RT TURN Fuses


Object Number: 1566827  Size: FS
Master Electrical Component List
Control Module References
HI HDLP LT, HI HDLP RT, LO HDLP LT, and LO HDLP RT Fuses
4WD, BRAKE, CRUISE, HVAC 1, and IGN 3 Fuses
Figure 17:

HI HDLP LT, HI HLDP RT, LO HDLP LT, and LO HDLP RT Fuses


Object Number: 1566829  Size: FS
Master Electrical Component List
Control Module References
ETC/ECM, INJ 1, INJ 2, and PCM 1 Fuses
FLASH, LT TRLR, LT TURN, RT TRLR, and RT TURN Fuses
HVAC/ECAS, IPC/DIC, PCM B, SEO B1, SEO B2, TBC BATT, and TREC Fuses
HVAC/ECAS, IPC/DIC, PCM B, SEO B1, SEO B2, TBC BATT, and TREC Fuses
Figure 18:

ETC/ECM, INJ 1, INJ 2, and PCM 1 Fuses


Object Number: 1566831  Size: FS
Master Electrical Component List
Control Module References
HI HDLP LT, HI HDLP RT, LO HDLP LT, and LO HDLP RT Fuses
HVAC/ECAS, IPC/DIC, PCM B, SEO B1, SEO B2, TBC BATT, and TREC Fuses
HVAC/ECAS, IPC/DIC, PCM B, SEO B1, SEO B2, TBC BATT, and TREC Fuses